I have noticed that too and it has GOT to be the Gecko engine, because both IceDragon and Pale Moon do similar "senior moments" as I call them.

But for me it could be the fastest browser on the planet but until it supports low rights mode its just too risky for my customers. there are plenty of bugs like the "Yahoo Porn Bug" which will not work in any other browser, not even IE, that work in FF for me to give it to my customers.

Speed is fine but not when its at the cost of security and having the browser run at the same rights as the user is just dumb,especially when we are talking about a security feature that first came out in windows Vista which is about to become 4 releases ago. It would also probably be trivial to adapt low rights mode to work with AppArmor and SELinux so there really is no excuse not having such a useful security feature.

I have found a good 90% of the infections come from the browser so by having the browser run in lower rights drops infections right off the scale. No way I'm gonna risk my customers for a little speed,no way.

Speed is fine but not when its at the cost of security and having the browser run at the same rights as the user is just dumb,especially when we are talking about a security feature that first came out in windows Vista which is about to become 4 releases ago. It would also probably be trivial to adapt low rights mode to work with AppArmor and SELinux so there really is no excuse not having such a useful security feature.

So this feature only works on vista/win7/win8 with IE? It does not work on linux, winxp, macos, android? And it does not work with Firefox, Chrome, Opera, Safari?

I have noticed that too and it has GOT to be the Gecko engine, because both IceDragon and Pale Moon do similar "senior moments" as I call them.

I like Firefox's user interface, I dunno what it is, but I prefer it.

But I don't use it for development other than doing CSS anymore since Chrome's tools are far better.

IE9 and 10 IMHO are more than good enough for most people. I've also got well past the stage of evangelising a better browser ... if people have problems they will ask or find a better solution.

Having slightly better performance is great and all but I think there are so many little problems with Firefox these days it is a dubious honour (and for the person who wants to know what these are they are so numerous and odd that I could not possible list them all).

If we're talking anecdotes I've noticed this behavior in both Firefox and Chrome at times, but one of the big notes about Firefox performance in this review was that they've fixed a lot of their UI freezes to the point where it feels noticeably snappier.